Faced with this sudden sound, Li Yi was caught off guard and fell into the move.

Because Yin Fuxiong's spear was stabbing at his face just now, Li Yi had no choice but to dodge with his head sideways.

So now Yin Fuxiong's spear happened to be across his ear, so this huge sound exploded directly next to Li Yi's ear.

Such a close distance and the sound of Yin Fuxiong's thunder gun was so loud, which directly caused Li Yi's ears to hurt as if they had been pricked by needles.

Then a loud buzzing sound began to linger in his mind, and a huge feeling of dizziness immediately came over him.

After Yin Fuxiong fired this shot, he could see that Li Yi's figure was slightly tilted, and he also observed that Li Yi had a trace of pain on his face.

"It's done!"

Yin Fuxiong couldn't help but be overjoyed when he saw this.

As a result, the sub-gun in his left hand also quickly followed, wanting to completely finish off Li Yi with one blow.

But at the moment when his sub-gun stabbed towards Li Yi's heart, Li Yi's body suddenly spun violently, and then the iron rod in his hand quickly blocked Yin Fuxiong's sub-gun.

And Li Yi also took this opportunity to widen the distance between him and Yin Fuxiong.

"How is this possible?"

Yin Fuxiong couldn't help but be taken aback when he saw this.

He didn't expect that after his thunder gun was cast in the opponent's ear, the other party would be able to block his own shot.

"Fucking almost got on the ground, you guy's damage with this trick."

Li Yi said while tilting his head and rubbing his ears.

"How is this possible?"

The people watching the battle around also showed surprised looks.

They had also heard the sound of Yin Fuxiong's thunder gun just now, even though the distance between them and Yin Fuxiong was already more than twenty steps, but the loud sound still shook their eardrums with a faint pain.

They didn't dare to imagine how Li Yi, who was close at hand, could not react much in the midst of this loud noise.

"Hmph, since I knew before the fight started, I heard that these two spears of yours are the Thunder Spear, how could I not make some preparations!"

Li Yi plucked his ears and said with a smile.

"How did you resist my Thunder Gun?"

Yin Fuxiong was also very curious, how Li Yi guaranteed that he was safe and sound in this loud noise just now.

"It's easy, it's because of this!"

As he spoke, Li Yi took out a white mass from his ear.

"When did you put this thing in your ears?"

After seeing clearly that the thing in Li Yi's hand was a ball of cotton wool, Yin Fuxiong couldn't help but ask.

"Before we start, of course!"

Li Yi said as he stuffed the cotton wool back into his ears.

"No, since you just plugged your ears all the time, how can you hear me clearly when I talk to you?"

Yin Fuxiong couldn't help but ask angrily when he saw the smile on Li Yi's face.

"Isn't that easy? I can't afford to hear what you say, but I can see it! ”

Li Yi smiled and pointed to his mouth, indicating that he was judging what he said by reading the other party's mouth shape just now.

"You know how to read lips?"

Yin Fuxiong squinted his eyes and asked.

"It's just a little bit less proficient."

Li Yi said with a smile.

"This kid is really insidious! I didn't expect him to plug his ears before the fight. ”

"It's just that this kid is cunning, but it's still useless to be cunning, it's still martial arts and strength to fight, how can he, a hairy boy, compete with a master of the rivers and lakes like Yin Fuxiong, martial arts and strength."

"That's right, as long as Yin Fuxiong insists on attacking for a while, this kid will definitely be exhausted, and then he will be killed by Yin Fuxiong with one blow."

"I'm looking forward to seeing this kid's bloodstain resolved on the spot."

“······”

All of a sudden, the two dozen or so people whispered.

"Hmph, boy, even if you can plug your ears, it's useless, as long as my mother gun touches you when it makes a sound, you will still be hurt by the sound."

After seeing Li Yi blocking his ears, Yin Fuxiong didn't panic at all, he just said with a sneer.

"Isn't this bone conduction that I know?"

Li Yi said with a smile.

"Bone conduction? What bone conduction? ”

Yin Fuxiong obviously hadn't heard this word from Li Yi.

"Oh. This means that sound can be transmitted not only through the ears, but also through the bones. ”

Li Yi saw Yin Fuxiong asking, and he directly began to explain to him.

"Actually, to understand this principle, you have to understand the nature of sound."

"The nature of sound?"

Although the two sides were still in a state of duel at this time, Yin Fuxiong still asked curiously.

This is not to say that Yin Fuxiong is not focused enough on the competition, this is because he feels that if he can understand what Li Yi said, the power of his son and mother thunder gun may be even higher.

And the people around me are also very curious about the nature of sound.

What exactly is sound? This question sounds ridiculous, after all, there are many kinds of sounds that everyone hears every day, except for the deaf.

Everyone should know something so familiar.

But when they thought about it, they found that no one really could answer the question.

The more than 20 people at the scene frowned and began to think.

But even they didn't come up with a reason.

Obviously, they had never thought carefully about what the most familiar sound was on weekdays.

"Quite simply, the essence of sound is vibration."

Li Yi explained succinctly.

"The essence of sound is vibration?"

Yin Fuxiong unconsciously began to recall Li Yi's words.

"That's right, the so-called sound is actually vibration, like the sound of the piano is the vibration of the strings, the sound of the flute is the vibration of the flute membrane, and the sound of your thunder gun is actually the sound of the sound in your gun, the sound of vibration."

Li Yi saw that Yin Fuxiong was asking, and explained without reservation.

"Fart, what's the sound of that man's voice? What's going on with the wind in the world? ”

As for self-love, when Yin Fuxiong was thinking about the theory that Li Yi said, Mang Qing, who was watching the battle from the sidelines, couldn't stand it anymore, so he took the initiative to stand up and ask.

"Isn't it easy! When we speak, it's because our vocal cords are vibrating, and the wind is because the air is vibrating. ”

Li Yi explained Mangqing's problems one by one.

"What are the vocal cords?"

The man with the gourd hammer in his hand even felt like he was hearing in a fog.

"This so-called vocal cord is actually a thin membrane of flesh in the throat of a person, and when a person wants to speak, he relies on the vibration of this membrane to make a sound."

Li Yi pointed to his throat and said.

"Flesh film? We have a membrane of flesh in our throats? ”

Mang Qing sneered, and then said in a questioning tone.

"This kid is right, we really have a piece of flesh in our throat, and if this piece of flesh is broken, people can't speak."

Just as Mang Qing was questioning, a thin man with a blue face stood up in the crowd and said.

"Is what the ghost doctor said true?"

Mang Qing originally looked angry, and wanted to turn his head to see who dared to sing against him.

But when he saw the person who spoke, his tone immediately softened.

"Humph! My ghost doctor never tells lies! ”

The ghost doctor squinted his eyes and looked at Mang Qing with disdain, and then said coldly.

"Yes, you killed anyone who heard your ghost doctor lie."

A guy in the crowd who knew the details of ghost doctors muttered quietly.

"I'm afraid some people don't want this vocal cord anymore, and I don't mind removing it for you if you don't need it."

Although the man's voice was very quiet, it was still heard by the ghost doctor.

So the ghost doctor smiled and looked at the man who was muttering quietly.

When the man saw this, he immediately lowered his head and pretended not to know anything.

"Although I know that people's speech has something to do with that flesh membrane, but I still can't figure out where this rumor came from, I wonder if your kid can solve my confusion before he dies?"

After threatening the person who was secretly muttering to himself just now, the ghost doctor turned his head and looked at Li Yi with an evil smile.

"There's nothing wrong with telling you, but it's not certain if I'll die next."

As soon as Li Yi saw that this ghost doctor appeared, the extremely arrogant Mang Qing just now suddenly became much more honest, and he knew that the ghost doctor in front of him was definitely not a good person.

"Let's put aside the question of whether to die or not for the time being, you better solve my doubts first."

The ghost doctor couldn't help but laugh when he saw Li Yi being so confident.

"The sound of the wind is just the sound of the air vibrating."

Li Yi didn't hide it, he said the answer himself.

"Air?"

When the ghost doctor heard the name, he roughly guessed what the so-called air was, but he didn't know how the air vibrate.

Seeing the ghost doctor frowning, Li Yi also guessed his doubts, so he continued.

"If you don't understand, then you can think of the air as water, and when the water is moving, it vibrates and makes the sound of water, and the wind is like the sound of water."

"Interesting! It's really interesting! As soon as you explain that, I will understand it completely. ”

The ghost doctor's eyes lit up when he heard this, and he immediately clapped his hands happily and said.

"Tsk! It's a pity, if it were another time, I really wouldn't be willing to kill you, but I've already taken this task, even if it's a pity, I have to be ruthless to you today. ”

Immediately, the ghost doctor looked at Li Yi with some regret, and then said reluctantly.

"In that case, if I don't die today, you can follow me, and I can solve any questions you don't understand in the future."

Since Li Yi came down from the mountain, he has rarely seen anyone who will have an understanding of the nature of everything in this world.

Although he also saw a lot of objects in Anzhou, and many of them used physics knowledge, most of the craftsmen knew what they were but didn't know why.

They don't have a deeper understanding and study of the principles of these things, they just apply them more often.

In the entire Anzhou City, he only saw Jin Shi alone, and he could be regarded as having an exploration and recourse to the essence of things.

However, Jin Shi's exploration is also relatively limited, and he only studies things related to organs and objects.

This part of the East and West Thai poles collectively refers to them as physics.

Li Yi didn't expect that he would meet another person here today who has an understanding of the nature of things, and this person is still a doctor.

Judging from what the ghost doctor said just now, he must have studied the human body very carefully.

Otherwise he would not have known about the presence of the vocal cords at all.

As for this part of the human body, Taijizi has put it into the category of living things.

And Li Yi knows that the knowledge of the human body is only a small part of the living things.

Therefore, when he saw such a rare person as a ghost doctor, Li Yi started to take it as his own.

"Hahaha! You're such an interesting boy, my ghost doctor is so old, and no one has ever dared to talk to me like this! ”

The ghost doctor couldn't help but laugh when he heard this.

"Okay, ghost doctor, what do you have to wait for this kid to talk about before he dies, and now my battle with him is not over!"

Yin Fuxiong saw that the ghost doctor and Li Yi were chatting hotly, and he actually put himself aside, so he couldn't help but be angry.

"Okay, okay! Since you yourself are in such a hurry to find death, I can't stop you, I'd better wait for you guys to lie down before making a move! ”

The ghost doctor saw Yin Fuxiong looking at him angrily, so he smiled wryly, and then jumped and landed on the wall of the courtyard.

"Humph! I'm afraid you don't have this chance! ”

Yin Fuxiong snorted coldly, and then walked towards Li Yi again with the Thunder Gun in his hand.

"Boy, even if your ears can't hear the sound of my mother gun, it doesn't matter, after all, the thunder of this mother gun is just an aid, and you will eventually be defeated by strength."

After confirming that his mother gun was useless, Yin Fuxiong was not worried.

He always believed that his martial arts must be better than the kid in front of him.

"Humph! People often say stupid big guy, it looks really good, Yin Fuxiong, you are really a stupid big guy! ”

Just when Yin Fuxiong was about to attack, Mang Qing in the crowd said with a sneer.

"Mangqing, what do you mean? Are you also going to taste the power of my thunder spear? ”

Yin Fuxiong didn't expect Mang Qing to provoke himself again, so he looked at Mang Qing Dao with angry eyes.

"Forget it, I don't have time to fight with a guy like you!"

Mang Qing sneered with a crooked mouth.

"What do you mean? You make it clear! ”

"Humph! Although that kid blocked his ears just now, but your shot just now still shook his ears to tinnitus, otherwise how could he have talked so much with us guys, he was obviously delaying time just now to recover, it's a pity that you idiot can't see it! ”

Mang Qing saw Yin Fuxiong's unrelenting posture, and he couldn't help but smile bitterly and said.

As soon as Mang Qing's words came out, everyone present focused their eyes on Li Yi.

Everyone had noticed something was wrong, but they never figured out what was wrong.

Now after Mangqing's reminder, everyone reacted.

"Boy, your ears are almost recovered, aren't they?"

Mang Qing then asked.

"That's right, it's almost recovered!"

Li Yi said as he took out cotton wool from both ears.

"I see, it's a cunning boy, but isn't it too early for you to take out the cotton wool now?"

Yin Fuxiong glared at Li Yi and said.

"I tried it just now, the power of your thunder gun is really extraordinary, my cotton wool prepared in advance can't withstand your gunshot, in that case, I might as well throw them away."

Li Yi immediately threw the cotton wool to the ground.

"Hmph, boy, you threw away that cotton wool, how are you going to resist my gunfire next?"

Yin Fuxiong asked with some puzzlement.